Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
76
for - 1°.2 danner en lang Varm e-Tunge mod Nord
udenfor Beeren-Eiland- og Spidsberg-Banken, med koldere
Vand inde ved Banken. Nær parallel med den løbe
Isothermerne for — 1°.3, — og – l°.ö. Den laveste
Temperatur, — l°.t>, findes indenfor den sidste i
Gronlands-havet nordenfor .Tan Mayen. Paa den sydvestlige Hand af
Jan-Mayen-Banken er et lidet Teniperaturmaximuni paa
— 1°. Paa den søndre Side af Jan Maven-Renden gaa
kolde Tunger mod Sydost.
PI. XXIV viser Temperaturens Fordeling i 1500
Favnes Dyb. Her have vi to adskilte Bassiner. I det
sydlige er et Temperatttl-Maximum paa — l°.l omgivet af
koldere Vand ved Bankerne, indtil 1°.3. Paa Jan
Mayens Bredde ligger et andet Maximum paa over — 1°.2,
og udenfor Vesteraalen et lignende af meget mindre
Omfang. I Indhugtningerne i Banken i Lofot-Dybet ligge
Minima paa — l°.3 mod Nord, mod Øst og mod Syd.
1 det nordre Bassin optræder — 1°.5 mod Øst og
— 1°.6 mod Vest. Det koldeste Parti er det sydvestre
Hjørne. Bundens Fonn nordenfor dette kjendes ikke.
5. Temperaturens Fordeling ved Havbunden.
Pl. XXV viser Temperaturens Fordeling ved
Havbunden. Man ser, at den største Del af Havbunden i vort
Nordhav er dækket af iskoldt Vand, hvis Temperatur er
under — 1°. Forfølger man Linien for 0°, ser man, at den
overalt, undtagen i Østhavet, ligger nær den for — 1°. I
Atlanterhavet er der Varmegrader ved Bunden, i vort
Nordhav findes disse kun paa Kystbankerne og i den vestlige Del
af Østhavet. Men de strække sig mod Nord lige op til
den HO. Breddegrad paa Havets østre Side. ved
Spidsbergen. A and med Varmegrader dækker Islands Kystbanker
rundt oiu hele Øen, Island-Færø-Ryggen. Færø-Bankerne,
Wyville-Thonison-Ryggen, hele Nordsoens Flak, de norske
Kystbanker, den vestlige og sydlige Del af Østhavet,
Vest-spidsbergens Banker og en liden Del af Jan
Mayeu-Ban-ken. Grændselinien 0° følger saaledes i det Store
Bankernes Omrids. Disse holde, saa at sige, det iskolde Vand
langt borte fra Islands Kyster, fra Færøernes Kyster, fra
de skotske Øer, og fra Norges Kyster og Fjorde og, om
end i ringere Grad, fra Beeren-Eilands og Spidsbergens
Vestkyst. Hvor Bankens Eg nærmer sig Land, nærmer
ogsaa det iskolde Vand sig samme, som nordenfor Færøerne,
ved Storeggen, ved Vesteraalen, livor Afstanden fra Land
ved Andenes kun er 20 Kvartmil, og ved Spidsbergen.
Men overalt ligger, som Verticalsnittene vise, Nul Grad
paa Bankens ydre Skraaning, intetsteds stige
Kuldegraderne over Eggen ind paa Banken. Det er saaledes
virkelig Banken, der ved sin Form og Udstrækning holder
Both maxima are encompassed liv the isotherm for — l".l.
The isotherm for — 1°.2 constitutes a long tongue of heat,
extending north off the Beeren-Eiland and the
Spitz-bergen Bank, with colder water in its immediate
proximity. Well-nigh parallel to it run the isotherms for
— l°.3, — 1°.4, and — 1°.5. The lowest temperature,
— 1°.(), occurs westward of the last in the Greenland
Sea, north of .Ian Mayen. On the southwestern margin
of the Jan-Mayen Bank, there is alimited
temperature-maximum of — 1°. On the south side of the Jan-Mayen
Channel, cold isothermal tongues extend towards the
south-east.
Pl. XXIV shows the distribution of temperature at
a depth of 1500 fathoms. Here we have two separate
basins. In the southern, there is a temperature-maximum
of — l°.l, surrounded at the banks by colder water
reaching 1°.3. On the latitude of Jan Mayen occurs another
maximum of more than 1°.2; and off Vesteraalen we
have a third, of very limited extent. In the indentations of the
bank in the Lofoten Deep, there are minima reaching - 1°.3
towards the north, towards the east, and towards the south.
In the northern basin, occurs a temperature of— 1°.5
towards the east, and of 1°.(> towards the west. The
coldest part is the south-western corner. The contour of
the sea-bed towards the north lias not yet been determined.
5. Distribution of Temperature at the Sea-Bottom.
Pl. XXV shows the distribution of temperature at
the bottom. The greater part of the bed throughout the
North Ocean is covered with ice-colfl water, having a
temperature below — 1°. If we follow the isothermal line
for 0°, we shall everywhere find it. save in the Barents
Sea, near that for — 1°. In the Atlantic, degrees above
0° occur at the bottom; in the North Ocean, on
tin-coastal banks only; and in the Barents Sea, throughout
the western part. But towards the north, they extend up
to the 80th parallel of latitude, on the east side of the
sea, off Spitzbergen. Water with a temperature above 0"
covers the Iceland coastal banks, all round the island,
likewise the Iceland-Fau’oe Ridge, the Færøe Banks, the
Wyville-Thoiiison Ridge, the whole of the North-Sea. Flat,
the Norway coastal banks, the western and southern tracts
of the Barents Sea, the West Spitzbergen Banks, and a
small portion of the Jan-Mayen Bank. The boundary line
for 0° follows, therefore, speaking generally, the contour of
the banks. These keep, it may be said, the ice-cold water
far away from the coasts of Iceland, from those of the
Færoes, from the Scottish isles, from the coasts and fjords of
Norway, and also, though in a less degree, from the
western shores of Boeren Eiland and Spitzbergen. Where the
edge of the banks approaches land, the ice-cold water does
so too, as, for exemple, north of the Færoes, off the Storeg.
off Vesteraalen (here the distance from land — off Andenes
— is only 20 nautical miles), and off Spitzbergen. But 0°
<< prev. page << föreg. sida << >> nästa sida >> next page >>
